The Density of Particle System is inverted between viewport and render
If you look at the &quot;Density&quot; entry, on the far right, there is an open diamond shape, and the &lt;-&gt; is orange.  This means that you have set a keyframe on density.

You need to clear the keyframe.  If you have a playback window, go to it and select all of the keyframes with the a key.  Then hit the x key and select &quot;delete keyframes&quot;

You can tell that this worked because the diamond and orange will disappear: